Key figures

Tax information Switzerland

Withholding tax

No

Swiss income tax

No

Stamp tax

No

Product calendar

Fixing date

10.03.2011

Last trading date

Open end

Expiry

Open end

UBS Open End PERLES

With UBS Open End PERLES (PERformance Linked Equity Securities) or Open End Index Certificates, you participate
in the performance of the underlying asset or an index or basket with unlimited duration. UBS Open End PERLES
are therefore especially suitable for long-term investors. Once you have purchased them, you can remain
permanently invested with UBS Open End PERLES without having to constantly worry about reinvestment.

Thus with UBS Open End PERLES you can simply and conveniently participate with only one transaction in the
price potential of a broad equities market in one specific country (e.g. Switzerland, USA or China) or a whole
region (e.g. Europe, Asia or Latin America) depending on the underlying asset. The potential fields of
application however go beyond this, as the respective index (or equities/index basket) can be shaped
individually and thus also refer to specific topics (e.g. water, uranium or BRIC states), selected sectors
(e.g. automotive stocks, financial equities or pharma stocks) or investment styles (e.g. small caps, mid
caps or blue chips).

The underlying index can track not only equities, but also other asset classes, such as bonds (e.g.
credit-linked notes), currencies or commodities. UBS Open End PERLES are suitable for investors with a medium
to high risk preference. Investors must take both the market risk and the issuer risk into consideration, since
loss of the invested capital could occur if UBS AG becomes insolvent, regardless of the performance of the
underlying asset.